JP6002278B2 - Physical data channel selection based on application traffic patterns - Google Patents

Description

  The present application relates to wireless devices, and more particularly to a system and method for selecting a physical channel for data communication in a cellular communication system based on application traffic patterns.

  The use of wireless communication systems is expanding rapidly. In addition, there are a number of different wireless communication technologies and standards. Some examples of wireless communication standards include GSM®, UMTS (WCDMA, TDS-CDMA), LTE, LTE Advanced (LTE-A), HSPA, 3GPP2 CDMA2000 (eg, 1xRTT, 1xEV-DO, HRPD). EHRPD), IEEE 802.11 (WLAN or Wi-Fi), IEEE 802.16 (WiMAX), Bluetooth (registered trademark), and the like.

  Cellular communication technology can provide various services and can be used by various applications. Various applications that utilize cellular communications may have various characteristics. Cellular communication techniques that do not take into account different application characteristics of different applications that use cellular communication can result in inefficient operation. Therefore, improvements in that area would be desirable.

  In particular, presented herein are methods for selecting a physical channel for data communication in a cellular communication system based on application traffic patterns, and embodiments of equipment configured to implement the method. .

  According to the techniques described herein, multiple physical channels can be provided for unicast data communication in a cellular system. The plurality of physical channels may include both a plurality of physical uplink channels and a plurality of physical downlink channels. Different channels can have different characteristics so that each channel can be optimized for use with a particular type (or types) of application traffic patterns. For example, one physical channel may be optimized with periodic and / or low data rate application traffic patterns, and another physical channel may be optimized with aperiodic and / or high data rate application traffic patterns. .

  When establishing a data radio bearer between a radio equipment and a base station, if multiple physical channels are available for data communication, which physical uplink and / or downlink channel the data radio bearer uses As part of the selection, the application traffic pattern of the application associated with the data radio bearer can be considered.

  Thereby, it becomes possible for the wireless device and the cellular network to communicate application data using a physical channel having characteristics optimal for the application traffic pattern of the application data being communicated. As a result, overall system resource usage and / or battery consumption characteristics of the device can be improved.

  The techniques described herein may be implemented in or implemented using a number of different types of equipment. These devices include, but are not limited to, base stations, access points, mobile phones, portable media players, tablet computers, wearable devices, and various other computer devices.

  This summary of the invention is intended to provide an overview of some of the subject matter described in this document. Accordingly, it will be understood that the above-described features are merely examples and should not be construed in any way to narrow the scope or spirit of the subject matter described herein. Other features, aspects, and advantages of the subject matter described herein will become apparent from the following detailed description, drawings, and claims.

  A better understanding of the present subject matter can be obtained by considering the detailed description of the embodiments described below in conjunction with the following drawings.

FIG. 1 illustrates an example wireless communication system. It is a figure which shows the base station ("BS". In an LTE environment, it is "eNodeB" or "eNB") in communication with a radio | wireless apparatus. 1 illustrates an exemplary wireless communication system that can be used in a voice over IP embodiment. FIG. 1 is an exemplary block diagram of a wireless device. FIG. 2 is an exemplary block diagram of a UE type wireless device. FIG. 3 is an exemplary block diagram of a base station. FIG. 3 is a communication flow diagram illustrating an exemplary method for selecting a physical data channel in a cellular communication system. FIG. 4 is a diagram illustrating an exemplary PDSCH and PUSCH data block processing procedure based on LTE. FIG. 4 is a diagram illustrating an exemplary PDSCH and PUSCH data block processing procedure based on LTE. It is a figure which shows the graph which shows the example performance comparison test case of convolution encoding and turbo encoding. , , , , , FIG. 2 illustrates an example protocol architecture and channel mapping candidates that can be used to support multiple physical unicast data uplink and downlink channels.

  While the features described herein are susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are described in detail herein. However, the drawings and detailed description thereof are not intended to limit the particular forms disclosed, but rather are within the spirit and scope of the subject matter as defined by the appended claims. It is to be understood that modifications, equivalents, and alternatives are intended to be covered.

Terminology The following is a glossary of terms used in this disclosure.
Storage medium-Any of various types of permanent memory devices or storage devices. The term “storage medium” refers to, for example, an installation medium such as a CD-ROM, floppy disk, or tape device; computer system memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, or the like It is intended to include random access memory; non-volatile memory such as flash memory, magnetic media (eg, hard disk drive), or optical storage; registers, or other similar types of storage elements, and the like. The storage medium may further include other types of permanent memory or a combination thereof. Further, the storage medium may be arranged in a first computer system in which the program is executed, or arranged in a second different computer system connected to the first computer system via a network such as the Internet. Also good. In the latter case, the second computer system can provide program instructions to the first computer for execution. The term “storage media” can include two or more storage media that can reside in multiple locations, eg, separate computer systems connected via a network. A storage medium may store program instructions (e.g., implemented as a computer program) that can be executed by one or more processors.

  Carrier medium-In addition to storage media as described above, a physical transmission medium such as a bus, network, and / or other physical transmission medium that carries a signal such as an electrical signal, an electromagnetic signal, or a digital signal. is there.

  Programmable hardware element-includes various hardware devices having a plurality of programmable functional blocks connected through a programmable interconnect. For example, FPGA (Field Programmable Gate Array), PLD (Programmable Logic Device), FPOA (Field Programmable Object Array), and CPLD (Complex PLD) are included. Programmable functional blocks can range from fine granularity (combinatorial logic or look-up tables) to coarse granularity (arithmetic logic units or processor cores). Programmable hardware elements may also be referred to as “reconfigurable logic”.

  Computer systems-personal computer systems (PCs), mainframe computer systems, workstations, network equipment, Internet equipment, personal digital assistants (PDAs), television systems, grid computing systems, or other devices, or combinations of these devices Any of various types of computer systems or processing systems. In general, the term “computer system” can be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a storage medium.

  User terminal (UE) (or “UE device”) — Any of various types of computer system devices that are mobile or portable and perform wireless communications. Examples of UE devices include mobile phones and smartphones (for example, iPhone (registered trademark), Androi (registered trademark) based phones), portable game machines (for example, Nintendo DS (registered trademark), PlayStation Portable (registered trademark)) , Game Boy Advance (registered trademark), iPhone (registered trademark), notebook computer, PDA, portable Internet device, music player, data storage device, or other handheld device. In general, the term “UE” or “UE device” is broadly defined to encompass electronic devices, computer devices, and / or communication devices (or combinations of devices) that are easily carried by a user and capable of wireless communication. can do.

  Base Station-The term “base station” has at least a radio communication station having all of its general meaning and used to communicate as part of a radiotelephone system or radio system installed in a fixed location. Including.

  Processing element-refers to various elements or combinations of elements. Processing elements include, for example, circuits such as ASICs (application specific integrated circuits), parts or circuits of individual processor cores, whole processor cores, individual processors, programmable hardware devices such as field programmable gate arrays (FPGAs), And / or includes a larger portion of a system that includes multiple processors.

  Channel-A medium used to convey information from a sender (transmitter) to a receiver. Since the characteristics of the term “channel” may vary depending on the radio protocol, the term “channel” used herein is used in a manner consistent with the standard of the type of device in which the term is used. Can be considered. In some standards, the channel width may be variable (eg, depending on device capabilities, bandwidth conditions, etc.). For example, LTE can support a scalable channel bandwidth from 1.4 MHz to 20 MHz. In contrast, the WLAN channel width may be 22 MHz, and the Bluetooth channel width may be 1 MHz. Other protocols and standards may include different channel definitions. In addition, some criteria define and use multiple types of channels, e.g. different channels for uplink or downlink and / or different channels for different applications such as data, control information etc. sell.

  Band-The term “band” has all of its general meaning and includes at least the portion of the spectrum (eg, radio frequency spectrum) reserved for whether the channel is used for the same purpose.

  Automatically-Computer systems (eg, software executed by a computer system) and devices (eg, circuits, programmable hardware elements, ASICs, etc.) without user input to directly specify and execute operations and operations Refers to actions and operations performed by. Thus, the term “automatically” is in contrast to operations performed or specified manually by the user that provide input for the user to perform the operation directly. Automatic procedures may be initiated by input provided by the user, but subsequent actions that are performed “automatically” are not specified by the user (ie, a “manual” execution in which the user specifies the execution of individual actions is not Not) For example, user entry of an electronic form by selecting each field and providing input specifying information (eg, by typing information, selecting a checkbox, or selecting a radio button) Although the system needs to update the form in response to user actions, it is a manual form entry. The form may be automatically filled in by the computer system, in which case the computer system (eg, software running on the computer system) parses the form fields and enters the form without user input specifying the responses to the fields. Fill out. As mentioned above, the user can trigger automatic filling of the form, but that does not mean that the user was involved in the actual filling of the form (for example, the user has not manually specified an answer to the field). They are filled in automatically). This document provides various examples of actions that are automatically performed in response to actions taken by a user.

1-3-Communication System FIG. 1 shows an exemplary (and simplified) wireless communication system. It should be noted that the system of FIG. 1 is merely one example of a possible system, and features of the present disclosure can be implemented in any of a variety of systems as desired.

  As shown, the exemplary wireless communication system includes a base station 102A that communicates with one or more wireless devices 106A, 106B, ..., 106N over a transmission medium. Some or all of the wireless devices may be user equipment, which may be referred to herein as “user terminals” (UE) or UE equipment.

  Base station 102A may be a base transceiver station (BTS) or a cell site and may include hardware that enables wireless communication with wireless devices 106A-106N. Base station 102A comprises the ability to communicate with network 100 (eg, a cellular service provider's core network, a telecommunications network such as the public switched telephone network (PSTN), and / or the Internet, among other possibilities). It may be. Accordingly, the base station 102A can facilitate communication between user equipment and / or between the user equipment and the network 100.

  A communication area (or coverage area) of a base station can be called a “cell”. The base station 102A and the plurality of UEs 106 are connected to various radio access technologies (RAT), GSM (registered trademark), UMTS (WCDMA, TDS-CDMA), LTE, LTE-Advanced (LTE-A), HSPA, 3GPP2 CDMA2000 ( For example, it can be configured to communicate through a transmission medium using any one of wireless communication technologies such as 1 × RTT, 1 × EV-DO, HRPD, eHRPD), Wi-Fi, and WiMAX.

  As such, base station 102A and other similar base stations (such as base stations 102B ... 102N) operating according to the same or different cellular communication technologies may be provided as a network of cells. The network may then provide continuous or near continuous overlapping services to wireless devices 106A-106N and similar devices over one large geographic area through one or more cellular communication technologies. .

  Thus, while base station 102A may provide a “serving cell” for wireless devices 106A-106N as shown in FIG. 1, each wireless device 106 may also be referred to as a “neighbor cell” (base station Signals from one or more other cells (which may be provided by 102B-102N and / or other base stations) could be received (and possibly within their communication range). Such a cell could facilitate communication between user equipment and / or between the user equipment and the network 100. Such cells may include “macro” cells, “micro” cells, “pico” cells, and / or cells that provide any of a variety of other granularities of service area size. For example, base stations 102A-102B shown in FIG. 1 may be macro cells and base station 102N may be a micro cell. Other configurations are possible.

  Note that in at least some cases, the wireless device 106 may be capable of communicating using multiple wireless communication technologies. For example, the wireless device 106 may be one or more of GSM, UMTS, CDMA2000, WiMAX, Bluetooth, a global positioning satellite system (GNSS, for example, GPS or GLONASS), a mobile television broadcasting standard (for example, ATSC-M / H or DVB-H). ) And / or two or more, etc., may be configured to communicate. Other combinations of wireless communication technologies (including two or more wireless communication technologies) are possible. Similarly, in some cases, a wireless device 106 (eg, a specialized wireless device) may be configured to communicate using only a single wireless communication technology.

  FIG. 2 shows a wireless device 106 (eg, one of devices 106A-106N) in communication with base station 102 (eg, one of base stations 102A-102N). The wireless device 106 may be a UE device with cellular communication capability, such as a mobile phone, handheld device, computer or tablet, or virtually any type of wireless device.

  The wireless device 106 can include a processor configured to execute program instructions stored in memory. Wireless device 106 may perform any of the method embodiments described herein by executing stored instructions. Alternatively or additionally, the wireless device 106 may perform any portion of any of the method embodiments described herein, or any of the method embodiments described herein. It can include programmable hardware elements such as FPGAs (field programmable gate arrays).

  In some embodiments, the wireless device 106 may be configured to communicate using any of multiple wireless access technologies / wireless communication protocols. For example, the wireless device 106 may be configured to communicate using two or more of GSM, UMTS, CDMA2000, LTE, LTE-A, WLAN / Wi-Fi, or GNSS. Other combinations of wireless communication technologies are possible.

  The wireless device 106 may include one or more antennas for communicating using one or more wireless communication protocols or technologies. In one embodiment, the wireless device 106 communicates using CDMA2000 (1xRTT / 1xEV-DO / HRPD / eHRPD) or LTE using one shared radio and / or GSM or LTE using one shared radio. May be configured. The shared radio may perform radio communication and may be connected to one antenna or may be connected to multiple antennas (for example, for MIMO). Generally, radios are baseband processors, analog RF signal processing circuits (including filters, mixers, oscillators, amplifiers, etc.), or digital processing (eg, for digital modulation as well as other digital processing) Any combination of circuits can be included. Similarly, a radio can implement one or more receive and transmit chains using the hardware described above. For example, the wireless device 106 can share one or more portions of the receive and / or transmit chain between multiple wireless communication technologies as described above.

  In some embodiments, the wireless device 106 receives a separate transmission and / or reception (eg, including separate RF and / or digital wireless components) for each of the wireless communication technologies that it is configured to use for communication. Chains can be included. As a further possibility, the wireless device 106 may include one or more radios shared by multiple radio communication technologies and one or more radios used exclusively by one radio communication technology. For example, the wireless device 106 can communicate with one shared radio for communicating using either LTE or 1xRTT (or LTE or GSM), and independent multiples for communicating using each of Wi-Fi and Bluetooth. You may have. Other configurations are possible.

  FIG. 3 illustrates an example and simplified portion of a wireless communication system that may be particularly useful for implementing voice communication using IP protocols, such as Voice over LTE (VoLTE) in LTE networks. Show. It should be noted that the term “VoLTE” as used herein may include voice services using current and / or future versions of LTE, including, for example, LTE-A.

  As shown, the wireless device 106 may include an IP Multimedia Subsystem (IMS) client 306 that may be implemented in various ways using, for example, hardware and / or software. For example, in one embodiment, software and / or hardware may implement an IMS stack that can provide the desired IMS capabilities, such as registration, AKA authentication with IPSec support, session setup and resource reservation, for example. it can.

  The wireless device 106 may be in communication with a base station, shown as eNodeB 102 in this exemplary embodiment. The eNodeB may then be connected to a core network, shown as an Evolved Packet Core (EPC) 100 in this exemplary embodiment. As shown, the EPC 100 may include a mobility management entity (MME) 322, a home subscriber server (HSS) 324, and a visited gateway (SGW) 326. The EPC 100 may further include various other equipment and / or entities known to those skilled in the art.

  The EPC 100 can communicate with the IMS 350. IMS 350 may include a call session control function (CSCF) 352. The call session control function (CSCF) 352 may itself include a proxy CSCF (P-CSCF), an inquiry CSCF (I-CSCF), and a serving CSCF (S-CSCF) as desired. IMS 350 may further include a media gateway control function (MGCF) 354 and an IMS management gateway (IMS-MGW) 356. IMS 350 may further include various other equipment known to those skilled in the art.

  Thus, the system of FIG. 3 illustrates an exemplary portion of a data path that can be used for voice over IP communications, eg, VoLTE.

FIG. 4-Exemplary Block Diagram of a Wireless Device FIG. 4 illustrates an exemplary block diagram of a wireless device 106 that may be configured for use in connection with various aspects of the present disclosure. Device 106 may be any of a variety of types of devices and may be configured to implement any of a variety of types of functionality. For example, the device 106 may be a substantially portable device (mobile device) such as a mobile phone, personal productivity device, computer or tablet, portable game console, portable media player, and the like. . Alternatively, if desired, the device 106 is a substantially installed device, such as a weather station, processing control element, measuring device, television, subwoofer, speaker, or other audio rendering device, set-top box. Also good.

  As shown, the device 106 can include a processing element 404. Processing element 404 may include or be connected to one or more local and / or system memory elements, such as memory 402. The memory 402 can include any of various types of memory and may be used for any of a variety of functions. For example, the memory 402 may be a RAM that functions as a system memory for the processing element 404. Other types and functions are possible.

  The device 106 can further include a wireless communication circuit 406. The wireless communication circuit 406 can include analog and / or digital circuit components and one or more radios. Generally, radios are baseband processors, analog RF signal processing circuits (including, for example, filters, mixers, oscillators, amplifiers, etc.), digital processing circuits (for example, for digital modulation as well as other digital processing), Can be included in any combination. The radio can implement one or more receive and transmit chains using the hardware described above. In some examples, the wireless device 300 may share one or more portions of the receive and / or transmit chain between multiple wireless communication technologies as described above. The wireless communication circuit may be connected to one or more antennas 408.

  Note that if desired, the wireless communication circuit 406 can include an on-board processing element in addition to the processing element 404. For example, the processing element 404 may be an “application processor” and the wireless communication circuit 406 may include its own “baseband processor”. Alternatively (or in addition), the processing element 404 can provide processing power to the wireless communication circuit 406. The device 106 can perform communication using any of various wireless communication technologies by the wireless communication circuit 406 and the one or more antennas 408.

  The device 106 can further include various other components (not shown) for implementing the functionality of the device, depending on the functionality intended for the device 106. Such other components include further processing and / or memory elements, one or more power supply elements (which may depend on battery power and / or external power supply), user interface elements (eg display, speaker, microphone, camera) Keyboard, mouse, touch screen, etc.), additional communication elements (eg, one or more antennas for wireless communication, multiple I / O ports for wired communication, communication circuits / controllers, etc.), and / or others Any of a variety of components may be included.

  The components of device 106, such as processing element 404, memory 402, wireless communication circuit 406, and one or more antennas 408, may be operatively connected through one or more intra-chip / chip-to-chip interconnect interfaces. An interconnect interface can include any of a variety of types of interfaces that may include a combination of multiple types of interfaces. As an example, a USB high speed chip-to-chip (HSIC) interface may be provided for inter-chip communication between the processing element 404 and the wireless communication circuit 406. Alternatively (or in addition), any of a universal asynchronous transceiver (UART) interface, serial peripheral interface (SPI), inter-integrated circuit (I2C), system management bus (SMBus), and / or various other communication interfaces , Processing element 404, memory 402, wireless communication circuit 406, and / or any other various device components can be used for communication. Other types of interfaces (eg, peripheral interfaces for communication with peripheral components internal or external to device 106) may also be provided as part of device 106.

  As described herein, the device 106 implements a hardware to implement a function for referencing a physical data channel for cellular communication based on application traffic patterns, as described above with respect to FIG. Hardware and software components.

FIG. 5-Exemplary Block Diagram of UE FIG. 5 shows an exemplary block diagram of a UE type wireless device 106. As shown, the UE 106 can include a system on chip (SOC) 500 that can include portions for various purposes. For example, as shown, the SOC 500 includes one or more processors 502 that can execute program instructions for the UE 106, and a display circuit 504 that can perform graphics processing and provide display signals to the display 560. Can be included. One or more processors 502 may include a memory management unit (MMU) 540 and / or a display circuit 504, a wireless communication circuit 530 (eg, including one or more radios), a connector I / F 520, and / or a display 560. (Such as) other circuits or devices. The MMU 540 receives addresses from one or more processors 502, such as the location in memory (eg, memory 506, read only memory (ROM) 550, NAND flash memory 510) and / or display circuitry 504. It may be configured to convert to other circuits or devices. The MMU 540 may be configured to perform memory protection and page table conversion and settings. In some embodiments, the MMU 540 may be included as part of one or more processors 502.

  As also illustrated, the SOC 500 may be connected to various other circuits of the UE 106. For example, UE 106 may include various types of memory (eg, including NAND flash 510), connector interface 520 (eg, for connecting to a computer system, dock, charging station, etc.), display 560, and (eg, LTE, CDMA2000, Bluetooth, etc.). , Communication circuitry 530 (for WiFi, etc.).

  As described above, the UE 106 may be configured to communicate wirelessly using multiple wireless communication technologies. In such cases, as also described above, the wireless communication circuit 530 is a wireless component shared between multiple wireless communication technologies and / or wireless configured only for use in accordance with a single wireless communication technology. Components can be included. As shown, the UE device 106 may include at least one antenna for wireless communication with the device with the cellular base station and / or others. There are many possibilities, but may include multiple antennas, eg, for implementation of MIMO and / or different wireless communication technologies. For example, the UE device 106 can use the antenna 535 to perform wireless communication.

  The UE 106 may also include and / or be configured to use one or more user interface elements. User interface elements include display 560 (which may be a touch screen display), keyboard (which may be a separate keyboard or implemented as part of the touch screen display), mouse, microphone and / or As a speaker, one or more cameras, one or more buttons, and / or any of a variety of other elements capable of providing information to a user and / or receiving / interpreting user input Any of a variety of elements can be included.

  As described herein, UE 106 implements hardware to implement functionality for referencing physical data channels for cellular communications based on application traffic patterns, such as described with respect to FIG. And can include software components. The processor 502 of the UE device 106 may perform some or all of the functions described herein, for example, by executing program instructions stored in a storage medium (eg, a permanent computer readable storage medium). May be configured. Alternatively (or additionally), the processor 502 may be configured as a programmable hardware element such as an FPGA (Field Programmable Gate Array) or as an ASIC (Application Specific Integrated Circuit). Alternatively (or additionally) the processor 502 of the UE device 106 may perform some or all of the functionality described herein with other components 500, 504, 506, 510, 520, 530, 535, 540, 550, It may be configured to implement with one or more of 560.

FIG. 6-Base Station FIG. 6 shows an exemplary block diagram of the base station 102. It should be noted that the base station in FIG. 6 is merely an example of possible base stations. As shown, base station 102 may include one or more processors 604 that can execute program instructions for base station 102. One or more processors 604 may also be connected to a memory management unit (MMU) 640 that receives addresses from one or more processors 604 and stores those addresses in memory (eg, memory 660 and read-only memory). (ROM) 650) and may be configured to convert to other circuits or devices.

  Base station 102 can include at least one network port 670. Network port 670 may be configured to connect to a telephone network and provide a plurality of devices, such as wireless device 106, with access to the telephone network as described above.

  Network port 670 (or additional network port) may additionally or alternatively be configured to connect to a cellular network, eg, a cellular service provider's core network. The core network may provide mobility related services and / or other services to multiple devices, such as wireless device 106. In some cases, the network port 670 may connect to the telephone network via the core network and / or the core network (eg, between other wireless devices serviced by a cellular service provider) A net may be provided.

  Base station 102 may include at least one antenna 634. The at least one antenna 634 may be configured to operate as a wireless transceiver, and may further be configured to communicate with the wireless device 106 via the wireless device 630. The antenna 634 communicates with the wireless device 630 via the communication chain 632. Communication chain 632 may be a receive chain, a transmit chain, or both. Radio 630 may be configured to communicate using various wireless communication technologies including, but not limited to, LTE, GSM, WCDMA, CDMA2000, and the like.

  One or more processors 604 of base station 102 may execute some of the methods described herein, for example, by executing program instructions stored on a storage medium (eg, a permanent computer-readable storage medium). It may be configured to do everything. Alternatively, the processor 604 may be configured as a programmable hardware element such as an FPGA (Field Programmable Gate Array), as an ASIC (Application Specific Integrated Circuit), or a combination thereof.

FIG. 7-Communication Flow Diagram In many cellular communication systems, one physical uplink channel and one physical downlink channel are defined and used for unicast data communication. For example, currently, in LTE, downlink unicast data communication is performed using a physical downlink shared channel (PDSCH), and uplink data communication is performed using a physical uplink shared channel (PUSCH).

  Increasingly, cellular communication systems are used to support multiple applications with multiple traffic patterns. A single physical channel may not be optimal for all traffic patterns where the characteristics of that physical channel may occur. However, if multiple physical channels with different characteristics suitable for different application traffic patterns are provided, communication system resource usage and power consumption profiles of devices in the communication system will be improved.

  Accordingly, FIG. 7 selects an uplink and / or downlink physical channel for data communication between the base station and the wireless device from a plurality of physical channel candidates based at least in part on the application traffic pattern. It is a communication flow figure showing a method for.

  The method of FIG. 7 can be used, inter alia, with the computer system and equipment shown in the above figures. As one possibility, this method may be performed between the wireless device 106 and the base station 102. Note that the approach shown in FIG. 7 may be used with an LTE system as one possibility, or with any of a variety of other cellular systems as desired.

  It should be noted that in various embodiments, some elements of the illustrated method may be performed simultaneously, performed in a different order than the illustrated order, or omitted. Additional elements may be performed if necessary. As shown, the method can operate as follows.

  At 702, a wireless device can attach to a cell provided by a base station. Attaching to a cell can include obtaining system information (e.g., a base station can broadcast in a system information block) and registering with the base station. When a wireless device attaches to a cell, it can initially operate in “idle mode”. In idle mode, the wireless device periodically monitors the cell for call information addressed to itself at scheduled intervals and shuts off the power supply of some or all of the wireless components between scheduled intervals (for example, A) can enter a low power state or “sleep”. A wireless device can attach to a cell according to any of a variety of RATs (and generally communicate with the base station that provides the cell), and the method by which the wireless device attaches to the cell can be It may vary depending on which RAT the station communicates with. As one specific possibility, the wireless device and the base station can communicate according to LTE.

  At 704, the wireless device and the base station can establish a first data radio bearer. When having application data to send or receive, the wireless device can first transition from “idle mode” to “connected mode”. This transition can include the establishment of a data radio bearer that can communicate application data (eg, packet switched). The transition from idle mode to connected mode may be initiated by the wireless device (eg, by a random access procedure or RACH) or by the base station (eg, by calling the wireless device).

  Establishment of the first data radio bearer may include selection of a physical uplink channel and a physical downlink channel that the first data radio bearer will use. In various scenarios, there may be multiple physical uplink channels and / or physical downlink channels that can be selected. Each physical uplink channel and / or physical downlink channel may have different characteristics.

  For example, the first physical downlink channel is selected as preferred for application data having a first application traffic pattern such as a low data rate (eg, a data rate below a data rate threshold) and / or periodic application traffic. It can be configured using the characteristics. On the other hand, the second physical downlink channel is preferred for application data having a second application traffic pattern such as a high data rate (eg, a data rate exceeding a data rate threshold) and / or aperiodic application traffic. It can be configured with selected properties.

  Similarly, the first physical uplink channel can be configured with characteristics selected as preferred for application data having a first application traffic pattern, and the second physical uplink channel can be configured with a second application. It can be configured with characteristics selected as preferred for application data having a traffic pattern. Alternatively, if necessary, the characteristics of the uplink physical channel may be different from those of the downlink physical channel, that is, the traffic pattern of the application used to select the uplink physical channel selects the downlink physical channel. Therefore, it may be different from the traffic pattern of the application used. A further possibility is that there are multiple selectable physical channels for downlink data communication only (for example, if only one uplink physical channel is provided for data communication) or multiple for uplink data communication only. There may be cases (eg, where only one downlink physical channel is provided for data communication).

  As an example of a possible characteristic that may differ between physical channels, the first physical (downlink or uplink) channel uses convolutional coding and the second physical (downlink or uplink) channel is Turbo coding may be used. In such cases, a channel using convolutional coding may be better suited for low data rate application traffic where simplification of implementation and / or reduction of power consumption is a priority over maximizing bandwidth efficiency. High-data-rate application traffic, where channels using turbo coding are prioritized to maximize bandwidth efficiency over reducing power consumption, and the benefits of interleaver configuration are greater for long packets Would be more suitable.

  As another example of characteristics that may differ between physical channels, the first physical (downlink or uplink) channel does not use hybrid automatic repeat request (HARQ) and the second physical (downlink or uplink) ) The channel may use HARQ. In such a case, a channel without HARQ will make periodic / predictable application traffic and / or application traffic with relatively low packet loss tolerance, such as voice applications, and / or BLER as low as possible. Alternatives to ensure acceptable quality of service that may be specific to applications that need to be (eg 1% BLER), applications that may not require HARQ, and / or periodic application traffic patterns It may be more suitable for applications that can use such methods (eg, introducing repetitive fixed patterns or using TTI bundling that does not require ACK / NACK feedback). In contrast, channels using HARQ may be more suitable for application traffic that supports non-periodic / unpredictable application traffic and / or relatively high packet loss tolerance and supports RLC retransmissions.

  Accordingly, in at least some examples, the selection of a physical uplink channel and / or a physical downlink channel for a first data radio bearer is an application associated with the first data radio bearer (“first application”). Based at least in part on application traffic patterns. As an example, the first application can be associated with the first data radio bearer when the data radio bearer is or is to be used to communicate application data of the first application. .

  The first application may be a voice application, a video application, an email application, a game application, a web browser application, an intelligent personal assistant application, a map application, a measurement / data collection application, a process control application, and / or various other types. It can be any application of various application types, including but not limited to any.

  The application traffic pattern of the first application (or other application) can be defined based on any of various characteristics of the application traffic of the first application. Application traffic periodicity / predictability may be one such characteristic. Average data rate and / or variation in data rate may be an additional or alternative characteristic. Any number of other additional or alternative characteristics are possible.

  For example, as one possibility, the first application traffic pattern may be defined as application traffic that is consistently periodic and below the data rate threshold. The second application traffic pattern may be defined as application traffic that is consistently periodic and exceeds the data rate threshold. A third application traffic pattern may be defined as application traffic that is not consistently perimeter. As another possibility, the exemplary “second” and “third” application traffic patterns are grouped as one or both application traffic categories that are not consistently periodic and exceed the data rate threshold. May be considered. Any number of other possible application traffic patterns can be defined if desired.

  Thus, in some instances, when establishing a data radio bearer associated with an application, a particular physical channel associated with the application traffic pattern for that application is selected, such that a given application traffic pattern May be associated with a given physical channel. For example, for a radio bearer associated with an application having a first application traffic pattern, a first physical downlink and / or uplink channel may be selected and associated with an application having a second application traffic pattern For the radio bearer, a second physical downlink and / or uplink channel may be selected.

  As a specific example, consider an LTE communication system. In such a system, a radio bearer is assigned a quality of service (QoS) class identifier (QCI) that can provide an indication of a packet error loss rate and an acceptable delay that may be tolerated by an application using the radio bearer. be able to. For example, a radio bearer with QCI 1 may be reserved for voice applications such as VoLTE. Thus, one possibility is to map any QCI 1 radio bearer to a physical uplink and / or downlink data channel (eg newly defined in LTE) with characteristics suitable for voice traffic. Can do.

  At 706, when the first radio bearer is established using the selected physical uplink channel and downlink channel, the wireless device and the base station transmit application data associated with the first application to the first Communicate via a radio bearer (eg, each of a wireless device and a base station can transmit and / or receive). In at least some cases, the application data may be unicast data (eg, as opposed to multicast or broadcast data).

  Since the first radio bearer can use the physical channel that would be suitable for the application traffic pattern of the first application, compared to using one type of physical channel for all data communications, Network resource utilization, device power consumption, and / or other system functionality may be improved. It also specializes in using only multiple applications (or a single application) with a particular type of traffic pattern by distinguishing traffic patterns and providing channels with characteristics optimized for that particular traffic pattern. Will enable the development and use of integrated devices.

  For example, in at least some examples, a given machine type communication (MTC) can generally include periodic, low data rate communication. For equipment that only needs to perform such communication (eg process control equipment, automation equipment such as thermometers, barometers, levitation, watt hour meters, seismometers), implement the equipment Can be simplified. Also, if the equipment does not need to support higher power consumption technologies designed for high throughput and / or optimized for non-periodic / non-scheduled communication, Can be reduced.

  As another example, mobile phones are increasingly implemented to support both voice and data services, but distinguish between multiple possible traffic patterns and are optimized for specific traffic patterns. To support packet-switched voice communications, such as VoLTE (and possibly applications with similar application traffic patterns), and / or designed for high throughput, and / or It is also possible to implement devices that do not support technologies that require higher power consumption, such as optimized for non-periodic / non-scheduled communications. For example, VoLTE packets are usually relatively small and will have a fixed length payload (eg, in some cases a transport block size of 328 bits will suffice). It can then be exchanged at regular periodic intervals (eg, 20 ms in some cases). Equipment that uses only physical channels with characteristics optimized for such types of application traffic is relatively simple to implement (and potentially less expensive) and / or has a reduced power consumption profile Would have. Such devices would therefore appeal to users who are particularly concerned about spending and / or battery-powered time.

  Thus, in some cases, a wireless device itself may be a single physical device, even though the wireless access technology used by the wireless device and the base station may support multiple physical channels for at least one of uplink and downlink communications. Note that only uplink and / or downlink channel support may be supported.

  However, if the wireless device supports multiple physical uplink and / or downlink channels, it means that the wireless device has some application traffic that can be optimized for a different physical channel than that used by the first radio bearer. This may be the case. In such a case, at 708, the wireless device and the base station can establish a second data radio bearer.

  Similar to the establishment of the first data radio bearer, the establishment of the second radio bearer may include one or more physical channels (eg, uplink and downlink) for the second radio bearer from among the plurality of physical channel candidates. Link) selection. The physical channel for the second radio bearer may be selected based at least in part on the application traffic pattern of the application associated with the second radio bearer (“second application”). The physical channel selected for the second radio bearer may be a different physical channel than the one selected for the first radio bearer. For example, the application traffic pattern of the second application may be different from the application traffic pattern of the first application, based on which a different physical channel is selected than that selected for the first radio bearer. It may be selected for the second radio bearer.

  Once the second radio bearer is established using the selected physical uplink channel and downlink channel, at 710, the wireless device and the base station transfer application data associated with the second application to the second radio bearer. (E.g., wireless devices and base stations can transmit and / or receive, respectively). It should be noted that, similar to the application data of the first application, the application data of the second application may also be unicast data in at least some examples.

  In at least some examples, if the application patterns of the first and second applications are similar or identical, the physical for the second application can be used if the first radio bearer has already been established. Note that there will be no reason to establish a second radio bearer with the second set of channels. For example, in such a case, in addition to transmitting application data related to the first application via the first radio bearer, communication of application data related to the second application via the first radio bearer May be. Alternatively, if desired, a separate radio bearer may be established for each application that is actively exchanging application data via a cellular link between the wireless device and the base station.

FIGS. 8-16-Typical LTE downlink and uplink channel coding procedures and modifications to support additional physical channels FIGS. 8-16 and the information provided therewith It is provided as an illustration of possible functions and is not intended to limit the disclosure as a whole. Numerous as well as derivatives of the following details may exist, but should be understood to be within the scope of the present disclosure.

  8-9 illustrate exemplary PDSCH and PUSCH data block processing procedures according to LTE.

  As shown in FIG. 8, transport channel processing for DL-SCH (which may be mapped to a PDSCH physical channel) includes transport block CRC addition, code block division and code block CRC addition, channel coding, rate matching. , And code block concatenation.

  As shown in FIG. 9, transport channel processing for UL-SCH (which may be mapped to a PUSCH physical channel) includes transport block CRC addition, code block segmentation as well as code block CRC addition, channel coding, rate matching. , Code block concatenation, data and control multiplexing, and channel interleaving.

  PDSCH and PUSCH can each utilize turbo coding, as currently defined according to the 3GPP specification. As one possibility, alternative physical channels (sometimes called E-PDSCH and E-PUSCH), each using convolutional coding, may be specified. Since LTE physical control channels (eg, PDCCH and PUCCH) may already use convolutional coding, provision of a physical data channel using convolutional coding is configured to use the current implementation of LTE. On the other hand, it will require little or no additional implementation complexity.

  FIG. 10 illustrates an exemplary comparative performance test case between convolutional coding and turbo coding for the selection of a relatively small transport block size (TBS) as may be used by low data rate applications. It is a graph. As can be seen from the figure, in the illustrated scenario, for each transport block size, the performance difference between concatenated turbo coding (CTC) and tailbiting convolutional coding (TBCC) is almost negligible. Therefore, for relatively low data rate applications where such a small TBS can generally be allocated, using a physical data channel that uses convolutional codes instead of turbo coding reduces power consumption and turbo A relatively simple implementation of convolutional coding can be achieved with little or no performance tradeoff for coding.

  FIGS. 11-16 illustrate protocol architectures and channel mapping candidates that can be used to support multiple physical unicast data uplink and downlink channels. The downlink and uplink architectures (shown in FIGS. 11-12, respectively) can include a packet data convergence protocol (PDCP), radio link control (RLC), and media access control (MAC) layer. The radio bearer established in the PDCP layer may be mapped to a logical channel, mapped to a transport channel, and further mapped to a physical channel by various functions performed in each middle layer.

  In particular, as shown in FIG. 11, both DL-SCH and DL E-SCH transport channels may be provided in the downlink for at least one UE, and as shown in FIG. 12, UL-SCH. And US E-SCH may be provided on the uplink. As also illustrated, hybrid automatic repeat request (HARQ) will be provided at the MAC layer for DL-SCH and US-SCH, but for DL E-SCH or UL E-SCH, HARQ is Will not be offered. Although not shown, if desired, ARQ may not be performed (eg, at the RLC level) for radio bearers associated with DL E-SCH and UL E-SCH. Other differences between channels are also possible (eg, the use of convolutional coding in DL E-SCH and UL E-SCH versus the use of turbo coding in DL-SCH and UL-SCH).

  FIG. 13 illustrates transport channel to physical channel downlink channel mapping candidates that may be used with the architecture of FIG. As illustrated, in addition to mapping BCH to PBCH, MCH to PMCH, and PCH and DL-SCH to PDSCH, DL E-SCH may be mapped to E-PDSCH. The PDCCH may not be mapped from the transport channel.

  FIG. 14 illustrates transport channel to physical channel uplink channel mapping candidates that may be used with the architecture of FIG. As illustrated, in addition to UL-SCH mapped to PUSCH and RACH mapped to PRACH, UD E-SCH may be mapped to E-PUSCH. The PUCCH may not be mapped from the transport channel.

  FIG. 15 illustrates logical channel to transport channel mapping candidates that may be used with the architecture of FIG. As shown, PCCH is mapped to PCH, BCCH is mapped to BCH and DL-SCH, CCCH, DCCH and DTCH are mapped to DL-SCH, MCCH and MTCH are mapped to MCH, and DTCH is mapped to It may be mapped to DL E-SCH.

  FIG. 16 shows logical channel to transport channel mapping candidates that may be used with the architecture of FIG. As shown, in addition to CCCH, DCCH and DTCH being mapped to UL-SCH, DTCH may be mapped to UL E-SCH. The RACH may not be mapped from the logical channel.

  Embodiments of the present disclosure can be implemented in any of a variety of forms. For example, some embodiments may be implemented as a computer-implemented method, a computer-readable storage medium, or a computer system. Other embodiments may be implemented using one or more custom designed hardware devices such as ASICs. Still other embodiments can be implemented using one or more programmable hardware elements such as FPGAs.

  In some embodiments, the permanent computer readable storage medium may be configured to store program instructions and / or data. Here, the program instructions, when executed on a computer system, for example, are any of the method embodiments described herein or any of the method embodiments described herein. Causes the computer system to perform a combination, or any subset of any of the method embodiments described herein, or any combination of such subsets.

  In some embodiments, a device (eg, UE 106) may be configured to include a processor (or processor set) and a storage medium. Here, the storage medium stores program instructions, and the processor is configured to read and execute the program instructions from the storage medium. Also, the program instructions may be any of the various method embodiments described herein (or any combination of the method embodiments described herein, or described herein). Any subset of the method embodiments) can be performed. The device may be implemented in any of a variety of forms.

  Although the embodiments described above have been described in considerable detail, numerous derivatives and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated. It is intended that the following claims be construed to include all such derivatives and modifications.

Claims (17)

A method for a base station to perform wireless communication with a wireless device, comprising:
In the method, the base station
Establishing a first radio bearer using a first physical downlink channel;
Selecting the first physical downlink channel for use in the first application based on an application traffic pattern of the first application;
Transmitting first unicast data comprising data for the first application to the wireless device on the first physical downlink channel;
Establishing a second radio bearer using a second physical downlink channel;
Selecting the second physical downlink channel for use in the second application based on an application traffic pattern of the second application;
Transmitting second unicast data comprising data for the second application to the wireless device on the second physical downlink channel;
The application traffic pattern of the first application is different from the application traffic pattern of the second application;
A method characterized by that. The first physical downlink channel uses convolutional coding and does not use a hybrid automatic retry request;
The second physical downlink channel using turbo coding, also Ru with hybrid automatic retry request,
The method of claim 1, wherein the this. Receiving the first data associated with the first application from the wireless device on a first physical uplink channel;
Receiving second data associated with the second application from the wireless device on a second physical uplink channel;
The method of claim 2, comprising: The application traffic patterns of the first application has a periodic traffic patterns, according to claim 1, wherein the application traffic patterns of the second application has a non-periodic traffic pattern, characterized in that the method of. The application traffic pattern of the first application has a traffic data rate that is less than a data rate threshold, and the application traffic pattern of the second application has a traffic data rate that exceeds the data rate threshold. The method of claim 1 . A base station configured to perform wireless communication with a wireless device,
A radio,
A processing element operably connected to the radio,
The radio and the processing element are:
Establishing a first radio bearer with the wireless device;
Here, the establishment of the first radio bearer includes selection of one or more physical channels for the first radio bearer among a plurality of physical channel candidates, and for the first radio bearer the one or more physical channels are selected based on the application traffic pattern of the first application associated with the first radio bearer,
Communicating application data associated with the wireless device and the first application via the first radio bearer,
Establishing a second radio bearer with the wireless device;
The establishment of the second radio bearer includes selection of one or more physical channels for the second radio bearer among the plurality of physical channel candidates, and the first radio bearer for the second radio bearer The one or more physical channels are selected based on an application traffic pattern of a second application associated with the second radio bearer and selected for the second radio bearer Is a physical channel different from the one or more physical channels selected for the first radio bearer;
Communicating application data associated with the second application and the second application via the second radio bearer;
A base station configured as described above. The plurality of physical channel candidates includes at least a first physical downlink channel and a second physical downlink channel;
The base station further comprises:
Selecting the first physical downlink channel for a radio bearer associated with an application having a first application traffic pattern;
Selecting the second physical downlink channel for a radio bearer associated with an application having a second application traffic pattern;
The base station according to claim 6 , configured as described above. The first application traffic pattern includes periodic traffic having a data rate less than a data rate threshold;
The second application traffic pattern includes aperiodic traffic and / or traffic having a data rate exceeding the data rate threshold;
The base station according to claim 7 . The plurality of physical channel candidates includes at least a first physical uplink channel and a second physical uplink channel;
The base station further comprises:
Selecting the first physical uplink channel for a radio bearer associated with an application having a first application traffic pattern;
Selecting the second physical uplink channel for a radio bearer associated with an application having a second application traffic pattern;
The base station according to claim 6 , configured as described above. A method for a wireless device for performing wireless communication,
In the method, the wireless device
Attaching to the first cell according to a first radio access technology (RAT);
Establishing a first radio bearer with the first cell according to the first RAT;
Establishing the first radio bearer includes selecting a physical downlink channel for the first radio bearer among at least two physical downlink channel candidates, the first radio bearer the physical downlink channel for is selected based on the application traffic pattern of the first application associated with the first radio bearer,
Communicating application data associated with the first application via the first radio bearer;
Establishing a second radio bearer with the first cell according to the first RAT;
Establishing the second radio bearer comprises selecting a physical downlink channel for the second radio bearer from the at least two physical downlink channel candidates, wherein the second radio bearer The physical downlink channel for a radio bearer is selected based on an application traffic pattern of a second application associated with the second radio bearer and the physical is selected for the second radio bearer A downlink channel is a physical downlink channel different from the physical downlink channel selected for the first radio bearer;
Communicating application data associated with the second application via the second radio bearer;
A method characterized by comprising: The first step of establishing a radio bearer In addition, the at least two physical uplink channel candidate includes the step of selecting the physical uplink channel for the first radio bearer, the first radio bearer the physical uplink channel for is chosen based on the application traffic patterns of the first of the first application associated with the radio bearer,
The method according to claim 10 . The method according to claim 10 , wherein the first radio bearer is a packet-switched radio bearer. The at least two physical downlink channel candidates include a first physical downlink channel and a second physical downlink channel;
The first physical downlink channel uses convolutional coding and the second physical downlink channel uses turbo coding;
The first physical downlink channel does not use a hybrid automatic retry request and the second physical downlink channel uses a hybrid automatic retry request;
The method according to claim 10 . The application traffic pattern of the first application is a low data rate periodic traffic pattern;
Wherein the first physical downlink channel, based on the said application traffic patterns of the first application is a periodic traffic pattern of the low data rate is selected for the first radio bearer,
The method according to claim 13 . The application traffic pattern of the first application is a high data rate and / or an aperiodic traffic pattern;
The second physical downlink channel, based on the the application traffic pattern high data rate and / or the first application is a non-periodic traffic pattern is selected for the first radio bearer The
The method according to claim 13 . The method of claim 10 , wherein the first RAT is LTE. The method of claim 10 , wherein the at least two physical downlink channel candidates are unicast physical downlink channels.

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